spencee



2 Sheet`s-Sheet- 1.

(No Mdel.)

G. F. SPENCER.

, BOILER.

No. 399,443.l Y 'Patented Mar. 12, 18.89.

2 Sheets-Sheet 2.

(No Model.)

G. P. SPENCER.

BOILBR.

Patented Mar. 12, 1889.

'ATM/ME75.

lNITED STATES PATENT OFFICE.

GEORGE F. SPENCER, OF rIlIlOllIPSON, yPE1TSYTXIA..

BOILER.

SPECIFICATION forming part'of Letters Patent No. 399,443, dated March 12, 1889.

Application filed JunelZ, 1888. Serial No. 276,790. (No modell To all '107mm fr; 'may offiz/cern:

Be it known that GEoRoE F. SPENCER, of 'l`hoznpson, in the county of Susquehanna and State of`Pennsylvania,have invented a new and Improved Boiler, of which the following is a full, clear, and exact description.

My invention relates to an improvement in boilers, and has for its object to increase the area of the heating-surface and provide for lthe rapid circulation of the water and steam.

The invention also consists in providing a boiler economical in fuel and wherein provision will be made for the settlement of all waste in the base of the boiler, thereby effect-ually preventing incrustation of the tubes.,

The invention consists in the construction",` and combination of the several parts, as williv be hereinafter fully set forth, and pointed out in the claims. y

Reference is to be had to the accompanying drawings, forming a part of this specification, in whieh'similar figures of reference indicate l, corresponding parts in all the views.

Figure l is a central vertical section through the complete boiler. Fig. 2 is a transverse section' online .fr a: of Fig. 1, and Fig. 3 is a detail elevation of the tubes.

In earryin g out the invention the base 10 is provided with a central opening in the top, provided with an u pwardly-exten din g liiange, 1l, to receive the body of the boiler, and with a draf t-door, 12, which door is also' utilizedv for removing the ashes. The body consists of a top and bottom, preferably cylindrical, heads 13 and ll, united by a series of spaced verti- 'cal water-tubes, 15, one of which tubes at the front is united with the upper head, 13, only, being made to extend vertically downward to Wii'hip a short distance of the lower head, 14, the opening thus provided being adapted for the reception of fuel or for the manipulation of the fire through a fire-door produced in the boiler-easing 17, which casing will be hereinafter described. v

Within the lower head, 14, a firepot, 1S, is constructed, and the walls of saidfire-pot are made to extend downward at suitable intervals, as shown at 19 in Fig. 1, for the reception of the grate 20. lVhen the body of the boiler is placed upon the base, the grat-e 2O body.

` .extends downward within the said base. The

space surrouiuling there-pot 1S in the lower head, 14:, is adapted for the reception of water. By reason of the fiange l1, integral with. the base, the lower face of the lower head, 1i, is held at an elevation from the upper face of the said base, as best shown in Fig. l. lYithin the several watertubes 15, 'with the exception of'the reduced water-tube 1li, concentric firetubes 21 are supported, which latter tubes are expanded or otherwise secured in suit-able apertures in the lower face of the lower head, 14, at one end, the otherend being held preferably in similar manner in the upper face of the upper head, 13.- A wall is formed for the body of the boiler lthrough the medium of a series of plates, 22, one of which plates is adapted to intervene each of th e several water-tubes, being attach ed 'at their lowei' ends to the upper surface of the lower head, ll, and extending upward in connection with the said water-tubes, as aforesaid, Within a short distance of the lower su rface of the upper head, 13, whereby a series of spaces, 23, are obtained surrounding the 'The plates 22 are omitted at the 'front of the boiler-that is to say, a plate is `omitted between the short-tube 1t' and the tube at each side of the same. The tubes at each side of the short tube 1G are provided, how

ever, with vertical plates 25, extending out ward from the water-tubes at.' right angles thereto, the said plates 25 being adapted to extend to a contact with the inner face of the boiler-easing 17 and upward a distance equal to the height of the walling-plates 22.

In the upper head, 13, a central aperture is made, through which aperture a magazine, 26, is'projecteil verticall)Y downward overthe fire-pot 1S, which nmgazine is adapted to contain the fuel to be fed to'thev tire. The said magazine is provided, preferably, with a conical annular jacket, :27, as best shown in Fig. 1, the upper end of the jacket terminating with the lower wall of the upper head, 13, constituting an integral portion thereof, thus forming a conical-dropped crown-sheet ofthe boiler, avoiding the danger of explosion by low water.

The short water-tube 16, in which there is no concentric fire-tube, is connected with the IOO , -the said casing-top, inclosing a numberof the y fire-tube openings, as best shown in Fie. 2.

- close to the upper head, l l,which is larger than within a short distance of the upper head, as

1nagazincfjacket through the medium of a horizontal pipe, 28, and the said water-jacket 27 is in turn united with the lower head, 14,vl by a series of upwardly-projecting tubes, 29. The body, havin gbecn placed upon the base, is surrounded by the jacket 17, which jacket is provided with a dome-shaped top, 30, having attached thereto an offtake-flue, 31, and is provided with a central aperture, 32, which is usually closed by a sliding cover, 33.

A detachable thilnble, 34, having a flange at the upper endis passed downward through {the central aperture in the top of the casing into the magazine, as best shown in Fig. 1,' whereby, when the lid 33 is thrown back, the coal or other fuel may be readily emptied into the said magazine.

Beneath the oftake-fl ue 31 a segmental flange, 35, attached to the upper surface of the upper head, 13, which vflange extends upward to a contact with the inner surface of The purpose of the flange is to distributehthe draft, so that an equal draft will be obtained for each of the fire-tubes. The easing 1'7 lits the lower head, 14, and between the body of the casing andA below the upper head a heating- .chamben 36, is formed,whieh chamber extends beneath the lower head of the body. Thus in operation, a suitable amount of water having been introduced int-o the lower head in any a] proved manner, the water rises in the several `water-tubes around the iiretubes, preferably illustrated by broken lines in Fig. 1. lVhen the water is at this point, all the water-tubes are filled, likewise the magazine-jacket, as said jacket, the water-tubes, and the heads ,are all connected, as has been hereinbefore stated. The fire having been built in the lirepot, the products of combustion pass upward in contact vwith the inner side of the watert-ubes, around the cnneeting-pipes 98 and 2f), and in contact with the outer surface of the water-jacket, over the top of the plates 22, through the spaces 23, down into the chamber .36, heating the outer side of water-tubes l5, to a contact with the top, side, and bottom surfaces of the lower head. From thence the products of combustion pass upward througlr the several fire-tubes 2l, over the upper surface of the upper head, and out'through the oiftake-fiue 31, as indicated in Fig. 1 by arro'ws.

It will be observed that the course pursued by the products of combustion in this construction of boiler is very circuitous, and that the heat thereof is utilized Ato a maximum ex- In Afirst building a fire a direct draft is desirable.- To this end the lid 33 is opened, the magazine being free of fuel, the detachable thimble removed, and the lid replaced.

' By this means the magazine is utilized as a vflue, the products of combustion now being able to pass directlyup the magazine. and out l thnough the oii'take-liue 51. The thimble is not replaced until the lire is well started. When replaced, the circuit of the draft is changed. As each and every water-tube, likewise the magazine-jacket, is connected with the lower head, 14, of the body, any sediment in the tubes or magazine-jacket will naturally fall downward and lodge in the said lower head, thereby preventing incrustation of the pipes.-

For convenience, if desired, the lower head, 14, may be provided With asuitable man-hole for cleaning the same. lVhen the boiler is to be used in connection with an engine, that portion of the-upper head within the circle of th e fire-tubes is preferably raised much higher than illustrated to form a dome for the accumulating steam, and also to prevent foaming or priming of the engine. When the upper head is thus constructed, the flues will be at all times sulnnerged, whereby unequal expansion is avoided and an accumulation of sedimentprevented upon the steam side of the flues.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isy l. The combination, with a vertical boiler andA its fire-pot and a smoke-box above the boiler, of a jacketed fuel-magazine extending down through smoke-box and the top of the boiler into the coinbiiStien-chamber arid having a movable or sliding*direct-draft? section within the smoke-box, the space within the jacket communicating with the interior of the boiler, substantially as set forth.

2. The combination, with the vertical casing having a smoke-box in its top, a fire-pot, and`ilues leading from the space above the fire-pot downward and then upward into the smoke-box, of a fuel-magazine leading down through the smoke-box into the eombustionchamber and provided with a removable secftion within the smoke-box, whereby by removing said section a direct draft through the magazine from the fire-pot to the smoke-box will be formed, substantially as set forth.

$5. The combination, with the vertical casin g having a smoke-box in its upper end, the boiler insaid casing consisting ofupper and lower water-chambers,tubes connecting them, concentric firctubes passing through the water-tubes and both water-chambers, the lower ends of the lire-tubes leading' from a space within the casing below thclowerwaterchamber and their upper ends discharging into the smoke-box, and baille-plates for causing the draft to pass from vthe upper part of the combustion-chamber downward to the lower ends of the lire-tubes, of a jacket-ed magazine extendin down through the smokebox and upper water-chaniber, with its jacketed space communicating with the interior of the boiler and having a removable.section within the smoke-box, by removing which a direct draft through the magazine will be formed, substantiall y as set forth.

IOO

IIO

l. In a boiler, the combination, with a lower Water-chamber surrounding the fire-pot, an upper Water-chamber, Water-tubes connecting the upper and lower chambers, and lire-tubes passed through the water-tubes and water- 'cha'mbers, of a fuel-magazine surrounded by a Water-jacket connected with the lower Water chamber and baille-plates partially closingA the space intervening the several Water-tubes, substantially as shown and described.

` 5. In a boiler, tbec-ombnation, witha lower water-chanibe surrounding the lire pot, a l base supportil g said cl1a1nber,ar1 upper Water-v chamber, Water-tubes connecting the upper and lower chambers,fi1etubes passingthrough the Water-tubes and said chambers, andbaiileplates partially closing the space intervening the Water-tubes, of a fuelmagazine surrounded by a Water-jacket connected with the lower Water-chamber and a casing surrounding' the chamber Vand water-tubes supported 4upon the base, substantially as shown and de- -Yided with an oitake-iiue, and. a ,segmental (leiecting-plate attached to the upper Watercliambei beneath said flue, all combined to operate substantiallyl as shown and deseribefl.

GEORGE F. SPENCER. AWitnesses:

i W. MESSENGER,

J. M. LAMoN'r. 

